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Shielding & Nuclear

Extremely High Shielding Performance

Containers and shielding for radioactive materials.

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ANVILOY® Tungsten Heavy Alloys are ideal for shielding against X-rays and gamma radiation. ANVILOY® Tungsten Heavy Alloy Shielding is more than 60% denser than lead, allowing a reduction in the size of shielding components, without compromising their shielding effectiveness and characteristics.

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ANVILOY® Tungsten Heavy Alloy Shielding can be used in applications such as:

  • Collimators

  • Nuclear shielding

  • Beamstop

  • PET syringe shields

  • Vial shields

  • Isotope containers

  • FDG containers

  • Multi-leaf collimator

  • More

Nuclear radiation shielding benefits from the properties of ANVILOY Tungsten Alloys

ANVILOY® Shielding of High Energy        X-Rays

The shielding of high energy photonic radiation is one of the most important uses of ANVILOY® tungsten heavy alloys because of the following characteristics:
▪ Good mechanical properties, with a yield strength comparable to hot rolled medium carbon steel.
(simpler still than nonhardened)
▪ Thermomechanical properties vastly superior to lead alloys.
▪ High attenuation of photonic radiation for a given thickness (specific attenuation)
▪ W-Ni-Fe offers less susceptibility to photonuclear activation than W-Ni-Cu alloys
▪ Low toxicity, chemical reactivity, and susceptibility to corrosion
▪ Easy machining – available in a wide range of sizes and shapes

ANVILOY® 3D Printed Tungsten Collimators

Virtually any 3D shape that can be drawn can be printed in tungsten. This includes x-ray collimators having parallel, slant, radial, and conical hole arrays. The tungsten advantage means the potential for sharper radiation cutoff than conventional collimators, leading to higher contrast gamma camera images or better angular resolution when using parallel hole collimators in radiation survey devices. The superior strength of tungsten versus lead provides greater resistance to handing damage. Tungsten collimators are dimensionally stable over time, even in elevated temperature environments.

ANVILOY® Benefits and Applications

ANVILOY® Tungsten Heavy Alloy Products with extreme density to ensure the highest possible shielding performance in the smallest of spaces:

  • Shielding components

  • Source container

  • Collimators

Application examples of ANVILOY® Shielding:

  • Transport container for radioactive substances

  • Radiation source holder in measuring devices

  • Radiation shielding of radioactive substances in chemotherapy

  • Collimator sheets in magnetic resonance tomographs

ANVILOY® Advantages vs. Lead

ANVILOY® Advantage

Shortcomings of Lead

+ Mass density 18.7g / cm³
+ physically and chemically stable
+ environmentally friendly

  • Mass density of lead 13.2g / cm³

  • Physically and chemically unstable

  • Environmentally harmful

Anviloy® Used in
Friction Bonding Research

Microstructural Examination to Aid in Understanding Friction Bonding Fabrication Technique for Monolithic Nuclear Fuel

Idaho National Laboratory Logo Image

by Karen Schropshire

Idaho National Laboratory

U.S. Department of Energy National Laboratory operated by Battelle Energy Alliance

April 2008

Monolithic nuclear fuel is currently being developed for use in research reactors, and friction bonding (FB) is a technique being developed to help in this fuel’s fabrication. Since both FB and monolithic fuel are new concepts, research is needed to understand the impact of varying FB fabrication parameters on fuel plate characteristics. This thesis research provides insight into the FB process and its application to the monolithic fuel design by recognizing and understanding the microstructural effects of varying fabrication parameters (a) FB tool load, and (b) FB tool face alloy.

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